Shibata Construction Survey’s September ransomware attack raises fears of over 3,500 personal data records leaking

Reports indicate that more than 3,500 personal data records may have been leaked following a ransomware attack on Japanese construction consultancy Shibata Construction Survey on September 20, 2026. The potentially affected information includes names, addresses, and phone numbers of landowners and others handled in work commissioned by local governments, although an actual external leak has not been confirmed.